Datasheet

MSP430F471x3, MSP430F471x6, MSP430F471x7
MIXED SIGNAL MICROCONTROLLER
SLAS626C -- OCTOBER 2008 -- REVISED MARCH 2011
53
POST OFFICE BOX 655303  DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
USCI (I2C mode) ( see Figure 25)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
f
USCI
USCI input clock frequency
Internal: SMCLK, ACLK
External: UCLK
Duty cycle = 50%  10%
f
SYSTEM
MHz
f
SCL
SCL clock frequency 2.2 V/3 V 0 400 kHz
t
H
o
l
d
t
i
m
e
(
r
e
p
e
a
t
e
d
)
S
T
A
R
T
f
SCL
 100kHz (standard mode) 2.2 V/3 V 4.0 s
t
HD,STA
Hold time (repeated) ST
A
RT
f
SCL
> 100kHz (fast mode) 2.2 V/3 V 0.6 s
t
S
e
t
p
t
i
m
e
f
o
r
a
r
e
p
e
a
t
e
d
S
T
A
R
T
f
SCL
 100kHz (standard mode) 2.2 V/3 V 4.7 s
t
SU,STA
Setup time
f
or a repeated ST
A
RT
f
SCL
> 100kHz (fast mode) 2.2 V/3 V 0.6 s
t
HD,DAT
Data hold time 2.2 V/3 V 0 ns
t
SU,DAT
Data setup time 2.2 V/3 V 250 ns
t
S
e
t
u
p
t
i
m
e
f
o
r
S
T
O
P
f
SCL
 100kHz (standard mode) 2.2 V/3 V 4.0 s
t
SU,STO
Setup time
f
or STOP
f
SCL
> 100kHz (fast mode) 2.2 V/3 V 0.6 s
t
Pulse width o
f
s
p
ikes su
p
p
ressed b
y
2.2 V 50 150 600 ns
t
SP
P
u
l
s
e
w
i
d
t
h
o
f
s
p
i
k
e
s
s
u
p
p
r
e
s
s
e
d
b
y
input filter
3V 50 100 600 ns
SDA
SCL
1/f
SCL
t
HD,DAT
t
SU,DAT
t
HD,STA
t
SU,STA
t
HD,STA
t
SU,STO
t
SP
Figure 25. I2C Mode Timing